Drawing-board



(No Model.)

- M. BRADLEY.

DRAWING BOARD.

No. 416,437. y Patented Deo. 3, 188,9. Y lfizy' .1. '.2,

| 5 J Il UNITED STATES PATENT OFFICE.

I MILTON BRADLEY, QF SPRINGFIELD, MASSACHUSETTS. I

DRAwlNG-BoARD.

SPECIFICATION forming part of Letters Patent No. 416,437, dated December 3, 1889.

Application filed August 29, 1889. Serial No. 322,383. (No model.)

To @ZZ whom it may concern.-

Be it known that I, MILTON BRADLEY, a citizen of the United States, residing at Springfield, in the county of Hampden and State of Massachusetts, have invented new and useful Improvements in Industrial Drawing-Kits,

of which the following is a specification.

This invention relates to drawing boards and tools therefor, the object being to provide a drawing-board of improved construction, on which provision is made for retaining in connection therewith7 for the purposes of transportation or packing away, certain tools to be used with said board; and the invention consists in the peculiar construction and arrangement of said drawing-board, all as hereinafter fully described, and pointed out in the claim.

In the drawings forming part of thisspecification, Figure l is a bottom plan view of a drawing-board embodying my improvements. Fig. 2 is a transverse section of the drawingboard on the line 2 2, Fig. 1. Fig. 3 is a longitudinal section of said board on the line 3 3, Fig. 1. Fig. 4: is a perspective view of a portion of the rear side of the drawing-board and of a portion of one of the drawing-tools, which figure is fully described below.

The essential purpose of this invention is to provide what may be termed an improved industrial drawing-kit for the use of schools where drawing is taught to yo ung persons, and to that end the drawing-board is so constructed, as below described, that the common tools-such as a square and trianglesmay be temporarily connected with or atattaclied to the board when the pupil has coinpleted his lesson, so that the board and said parts may be neatly packed away and the tools retained with each board until the latter shall be again required forjuse.

In the drawings, A is the drawing-board, con'- structed preferably of wood and havin g firmly secured against its rear side the strengthening-cleats B and D, each of said cleats having a passage or opening 2, formed between its inner side and the adjoining rear side of the drawing-board of sufficient width and depth to receive the bar 3 of the drawingsquare E, as shown in Fig. l, the head -i of the T-square E resting against the outer edge of the cleat B when the bar 3 occupies the said position under said cleats. The said cleat B, as shown in Fig. 4, and as indicated by a dotted line in Fig. 1 has formed in the edge thereof, next to the center of the board A, a Iabbeted groove 5. The said board A is constructed with one or more ribs 6 on its rear side, which ribs 6 have formed in one edge thereof a rabbeted groove 7, as shown in Fig. 4, and indicated by'dotted lines in Fig. 1 on said ribs. The said ribs are attached to the board A on the rear side thereof, at such angles relative to the cleatB and the position of the bar 3 of the T-square on said board as provides a suitable space between one edge of said rib and the adjoining edge of said bar to insert between the latter and the adjoining edge of one of said ribs a triangle 8 or 9, of like or dissimilar dimensions, as may be preferred. The said rabbeted groove 7, in one edge of each of the ribs 6, corresponds with the said rabbeted groove in the cleat B, so that before the T-square has its bar 3 passed under the cleats B and D either of said triangles S or 9 Inay be placed in the position shown in Fig. 1, with two of its edges passing within and engaging with the said rabbeted grooves 5 and 7, respectively, in the cleat B and the rib c, and by then passing the bar of the T-square under the cleats B and D, as aforesaid, and between the said two triangles, or against the edge of one thereof, if one only be attached to the board, one or both of said triangles are thereby held by the bar of the T-square in temporary engagement with the said cleat B and rib or ribs 6, and when the T-square is withdrawn from the board either one of said triangles may be moved toward the center of the board, and thus become disengaged therefrom for use on the opposite side thereof.

In practice drawing-boards .of this class, which are intended for school purposes, as aforesaid, are ordinarily provided with a greater or less number of sheets of drawingpaper h, attached to the front side of the board, as shown in Figs. 2 and 3.

V'Vhat I claim as my invention is- A drawing-board having cleats, substantially as described, on one side thereof, be- Corresponding to that in Said cleat, substantweeu which and said hoard are openings to tnlly as set forth. receive the bm' of a Tsqunre, one of which cleats has a rabbeted groove in its inner edge,

and one or more ribs on said board in proX- \Vitnesses: imity and arranged angnlarly to said rnb- II. A. CHAPIN, hetedcleat,lmvi11g a rnhheted groove therein l GEO. H. IRELAND.

MILTON BRADLEY. 

